Carrying scraper



May 16, 1944. H. D. KADz 2,348,910

CARRYING SCRAPER Filed March 4, 1942 3 She'etS-Sheet 2 Vdilu- LH 0d 46 69 c: lim 44,

Byww. l), Uw. #77X H. D. KADZ CARRYING SGRAPER Filed March 4, 1942 5- Sheets-Sheet 3- A T70 [EWE )f Patented May 16, 1944 CARRYING SCRAPER Harold D. Kad'z, Glendale, Calif., assigner to nayf Brunner Steel Broducts, Inc., a corporation et Delaware Application March 4, 1942, Serial N0. 433,2:83

'7' Claims.

My invention relates to carrying Scrapers, and

particularly, although not necessarily,- to that type of carrying scraper having a bowl mounted in a frame supported ona pair of wheels, and adapted to be drawn by a tractor to scrape earth into the bowl yfrom the surface of the ground, for

the purpose of leveling the ground and transporting the earth` accumulated as a resuit of such leveling to some point where it is dumped.

Two-wheel carrying Scrapers of this type as heretofore proposed, have been ineiective to level uneven ground, because the v vheels are disposd Ato opposite sides of the bowl, and, therefore, the Wheels advance in paths at opposite sides of the path of the scraping blade of the bowl. In consequence the ground over which the Wheels advance,

scraper blade is disturbed to `prevent proper leveling of the ground.

It is a purposeof my invention to provide, in a carrying scraper of the character described,

means which operate under forward movement of i:

the scraper to level paths for and. in advance of the wheels, so that irrespective ofthe unevenness of the k,ground the wheels willmove over level surfaces and thus maintain the scraping edge of `the bowl horizontally to cause it'to level the surface of the ground.

It is also a purpose of my invention toy provide in a two-wheel" type of carrying scraper. means for supporting the bowl to occupy loading, carrying, and dumping positions, and mechanisms for moving"thev :bowl to any one of the three aforementioned positions.

A furtherI purpose of my invention is the provision in a two-wheel carrying scraper as defined in the preceding paragraph, wherein scrapingimplements are disposed in advance of the wheels to scrape the ground in a manner todeiine level paths for "the wheels, and to guide the earth scraped by the Vlevelingy action, into the bowl.

Another purpose of my'finverltion is the provision of scraping implements as above delineated, wherein they extend laterally beyond the wheels vso vas-to scrape the ground at the bottom of curbings, embankments and the like, where the'bowlblade of the conventional scraper cannot reach.

I will describe only two' forms of carrying Scrapers, each embodying my invention. and will then point out the novel features thereof in claims.

In the accompanying drawings:

Fig. l is a view showing in top plan one form of carrying scraper embodying my invention.

Fig. 2 is aA View showingthe carrying scraper of Fig, l in side elevation,'with the scraping or loading position of the bowl illustrated in solid lines, and the dumping position of the bowl illustrated in broken lines.

Fig. 3 is a view showing in top plan another form of carrying scraper embodying my invention.

Fig. 4 is a view showing the scraper of Fig. -3 in side elevation, and other positions of the bowl and the operating mechanism in broken lines.

Fig. 5 is an enlarged fragmentary vertical sectional view taken on the line 5--5 of Fig. l.

Fig. 6 is a view similar to Fig. 5 taken on the line 6 6 of Fig. 3.

Similar reference characters refer to similar parts in each of the several views.

The form of carrying scraper shown in Figs. 1, 2, and 5, comprises a frame made up of two side members M identical in construction, and each comprising an vinne-r Yvertical plate I5 and an outer vertical plate IS. These two plates I5 and I6 are secured to each other and to the plates of the other pair by means of a pair of 4cross bars II extending across and secured to the vupper edges of the plates. These cross bars may be secured to a cross plate Ila with the latter in turn secured to the upper edges of Athe :plates I5 and I t. The plates of each pair are secured in spaced parallelism by a stub axle I8, and a sleeve I9 which is disposed at the upper corners of the platesv and provides a bearing fora stub shaft 2l! xed to and projecting from the adjacent side of a bowl B. Thus, with the two stub shafts 20 mounted inthe sleeves I9, the'bowl 'B is supported on the frame members M for pivotal i5 and l5, are mounted stub axles 2! for a pair of wheels W, and, inthe present instance, these wheels are shown as provided with pneumatic tires. The stub axles 2! extend between the plates of each pair, so that the wheels themselves are disposed between the plates I5 and l as best shown in Fig. 1. These stub axles 2l provide `pivots about which the side frame members M can swing inv effecting movement of the bowl B to loading and carrying positions.

As will be understood, the `scraper is adapted to be drawn by a tractor or similar form of motor vehicle, and `for coupling the scraper to a motor vehicle, a dra t bar 22 is provided. This draft bar 22 is formed with a U-shaped yoke 23, the parallel portions of which extend between the pairs of plates I and I6, where they are pivoted on the stub axles I8.

As best shown in Fig. 2, the plates I5 and I6 are of substantially triangular formation, with their forward and lower ends secured to a pair of scraping implements S. Each scraping implement comprises a concavo-convex body 24 to the lower edge of which is secured a scraping blade 25. At the outer end of the body 24 is secured a vertical plate 25 disposed in the same plane as the outer end of the body and the blade. It will be noted that the outer end of the implement extends beyond the outer plate I6 in order to protect the plate against being damaged by the dirt and rocks.

The bowl B is of the usual construction, except the scraping blade is not carried by the lower transverse edge of the mouth of the bowl, but is mounted separately therefrom. As best shown in Fig. 5,-secured to and extending between the inner plates I5 of the side members M, is a ledge 21 of box-like construction. The top of this ledge has substantially the same inclination as the bottom of the bowl, and at its forward edge a scraping blade 28 is bolted to a metal strip 29, the latter being suitably secured to the ledge structure 21. This blade 28 at its ends passes beneath the inner ends of the blades 25 of the scraping implement, and, as shown in Fig. l. the two scraping implements converge rearwardly to the scraping blade 28. The purpose of this arrangement will be described hereinafter.

At the inner ends of the scraping implements S vertical plates 38 are secured to and extend across the opposite ends of the ledge 21, so as to span the space between the bowl B and the scraping implements S and thus prevent earth from passing between the two back onto the ground and in front of the'wheels.

Means is provided for elevating the bowl B. the ledge 21 and the scraping implements S from a'scraping or loading position to a carrying position. This means, in the present instance, comprises a pair of hydraulic rams R, the cylinders of which are pivoted as at 3I to brackets 32 xed to the yoke 23. The pistons of the rams have the rods 33 thereof, pivotally connected to pins 34 secured to and extending between the plates I5 and AI 6 of the side frame members.

Means is also provided for moving the bowl B to the dumping position shown inbroken lines in Fig'. 2, and this means, in the present instance. comprises a pair of hydraulic rams R1, disposed at opposite sides of thev bowl and having the cylinders thereof pivotally connected to brackets 35 secured to a cross plate 36 extending between and secured to the plates I5 and I6. The pistons of the rams have the rods 31 thereof pivotally connected as at 38 to brackets 39 secured to the sides of the bowl.

' The operation of the carrying scraper just described, is as follows: With the parts of the scraper in the position shown in Figs. 2 and 5, the blade 28 is in scraping contact with the ground so that, under forward movement of the scraper, earth is scraped from the ground into the bowl. Likewise, the blades 25 of. the scraping implements are in contact with the ground to scrape earth therefrom and form level Paths for the wheels W. By reference to Fig, 1, it will be seen that the two scraping implements are disposed transversely of the paths which the Wheels Cil W will track, and, therefore, under the scraping action of the implements, thesepaths will be leveled to form level surfaces over which the wheels can move. As a result of the ground leveling action of the scraping implements, the two wheels W are caused, at all times, to travel over ground which is substantially level so that the bowl B is supported in a level position. In consequence, the blade 28 is, likewise, maintained in a level position to scrape the ground to a level plane, and thereby cause the scraper to perform its intended function of leveling a stretch of ground.

Because of the converging arrangement of the scraping implements S, the earth scraped from the ground by the implements, is guided rst onto the blade 2B, then onto the ledge 21, and finally into the bowl B. Thus, for a given wheel tread, the leveling path formed by the scraper is increased in width over that of previous Scrapers.

As will be observed from a consideration of Fig. l, the scraping implements S extend laterally beyond the plates I6 and, hence, laterally beyond the wheels W. In consequence, the outer or forward ends of the implements may function to scrape the ground at the base of vertical embankments or curbings, so that the bowl blade and the implements may eoact in scraping 'a roadway from one bounding curbing or embankment to the other.

Once the bowl is loaded with earth, the scraping implements and the blade 28 may be lifted clear of the ground by operation of the rams R. With pressure fluid supplied to the cylinders. of the rams so as to move the pistons rearwardly, the rods 33 will force the side frame members M rearwardly and upwardly about the stub axles 2I as a center; This movement of the side members is suicient to lift the scraping implements and the bowl blade 28 clear of the ground, and also to tilt the bowl rearwardly so as to hold the earth therein.

With the scraper in the earth carrying position just described, it is ready for movement to any destination for discharging its load. Earth may be dumped from the bowl by moving the lattern to the dumping position shown in broken lines in Fig. 2, through operation of the rams R1. By supplying pressure fluid to the cylinders of the rams so as to move the piston rods 31 rearwardly, the bowl is caused to swing upwardly about the stub shafts 28 as a center and until it reaches a position in which all earth is discharged from the bowl. Obviously, all parts of the scraper can be restored to their normal positions by supplying pressure fluid to the other side of the pistons for the rams R and R1 to draw the piston rods into the cylinders.

The other form of carrying scraper shown in Figs. 3, 4, and 6, comprises a rectangular frame F having side beams 40, a front beam 4I, and a rear beam 42. Connected to the front beam 4I is a draft bar 43 braced by converging beams 44,

F and by which the scraper is adapted to be drawn by a tractor.

A bowl B1 is pivotally mounted adjacent its forward end, within the frame F by means of pins 45 secured to the sides of the bowl and rotatably fitted in plates 46 secured to and depending from the side beams 40. The mouth of the bowl at its lower edge is provided with the usual scraping blade 41.

Rotatable in the side beams 40 and in ears 48, is a shaft 49a to the ends of which arms 49 are 'dumping .position shown in broken lines infFigi.' 4.

"2g-alias' ro 'hired in pairs to extend forwardly to opposite sides o f `the "frame 1F. 'The arms "of Aeach 'pair are braced by a crossplate 50,' and at ytheir for-k wardends they are provided with bearings -5I .3i-h which a' "stub iaXle 52 is jduinaled, and on "this stub 'axle between the arms, is 'a wheel W1.

""Abra'cket 5'3v is 'Hired toand 'rises lfrom the rear beam 42 vand theadjacent side beam '40,' and provides a support for the cylinder 54 of a hy'- drauli'c 'ram :The cylinder is pivoted at its Aupper lend 'to the 'bracket 'by a 'pin `55, while the 'r'od' 55 4o f the piston is pivotally connected as at 51"to the'inne'r "of the two arms 49. he t" o pairs of arms '49 `and Athe two'rams TR2,

as will -be more vfully described hereinafter. 5 g A second mechanism yis eniploye'ed 'to swing he bowl lB1 upwardly about "the pivots '45 'togth'e This mechanism Acomprises "two 'hydraulic preach idf 'which has `its cylinder sa pactadas .'at59 lto ears. (il) secured tothe 'upper side ofthe Athe ram is ypivoted as 'at t'z'to a short crank,

arm ajx'ed to a shaft 614 journaied in bearing lsleeves e5 'fixed to the front beam 4i. Likewise,

xed tothefsha'ft 64is'a'1'ohg crankarm 66 which extends rearwardly and is connected to thefadjacent side o'f the bowl B1 by a link 61.

Manifestly, when pressure iiuid is supplied to' the cylinders 58 to drive the pistons forwardly,

.the rods 6l will be advanced to move the crar'filrsk tended, as well as to, guide the earth scraped up by the implements, into the bowl` The same referencenumerals, but with the exponent a. have beenl employed on the. drawings,

to designate the same elements of the implements as in the first form of my invention.

The implements S1 are supported by uprights 68 xed to the side lbeams 40 ofthe frame, and to the forward edges of the plates 46. As shown in Figs. 3 and 6, the vertical guide plates-ja are secured to the inner ends of the bodies24, there being no ledge 21 as in the r'st form of scraper. r

From the preceding description of the second form of scraper, its mode of operation will be apparent, except the various positions to whichfthe vbowl B1 may be moved through actuation of-:the

Arams R2.

By referring to Fig. 4,- it will be seen that the bowl is in a scraping or loading position, wherein the blade 41 engages the ground, w-.lii'le the bottom of the bowl is spaced slightly from the. ground. Also, in this position the blades 25a are in scraping engagement with the ground.

When the rams R2 are actuated to force v.the wheels W1 downwardly, the latter will occupy the position shown in brokenlines in Fig. 4, to yelevate the bowl to a carrying position to lift the blade 41, as well as the implement blades 25a free of the ground. This carrying position of the bowl is shown in broken' lines and in relation to the ground iline shown in broken lines.

v`Should the rams Rf* be actuated to fswing the "arms 49 upwardly about `'the pivots 49a as a "center, v'the 'wheels W1 willfbe elevated to cause thebowlto be lowered onto the grounds, and the 4blades 41'and 25d-'into scraping position. This is another earth loading position of the scraper `rWhichis resortedto only 'when scraping exceptionally hard earth, -for the bowl being on the ground exerts a downward thrustwhich causes the blades -41 and 25a toA penetrate the hard wheels to` occupy ca'rrying and dumping positions; means operatively connecting said bowl earth. Conventionaldiggers 59, 69, may be `initially' employed to loosen the earth in advance 'of the 'blade 41, when they are removed lfrom the yonly 'two forms of carrying 'scrapers each em- "body'ing my invention, it is vto be understood that various changes and modications vmay 'be made therein withoutrdepar'ting Afrom thev spirit of my invention and the'spirita'nd scope of the 'apfpen'ded claims.

"l, claim: j l. In a vtwo 4wheel carrying scraper; a frame;

"afdraft bar pivoted on saidV frame;` a pair 'of vlwheels pivotally supportingsaid frame'' a Ybowl pivotally supported on said frame between said with said frame for moving the bowl to and from a dumping position; means operatively connecting said frame with said baivfor elevating said bowl from a loading position to a carrying po sition; and implements carried by said frame and extending to opposite sides of said bowl for scraping the earth in advance of said wheels, to form level paths therefor, and to guide the earth thus scraped into saidv bowl.

2. In a carrying scraper; a pair of frame members each comprising a pair. of spaced plates; a draft bar having a yoke the arms of which are pivoted to said members between said pairs of plates; a pair of wheels pivotally supporting said members; a bowl pivotally supported on and between said plates to occupyI loading, carrying and dumping positions; scraping implements secured to said frame members for leveling the earth in advance of said wheels; means operatively connecting said bowl with said frame members for moving the bowl about its pivot to occupy carrying and dumping positions; and means operatively connecting said frame members with said yoke arms for actuating said frame members to elevate said bowl to carrying position, and said scraping implements clear of the ground.

3. In a carrying scraper; a frame; a pair of wheels pivotally supporting the frame; a bowl pivoted on the frame; scraping implements carried by said frame and disposed in advance of said wheels for leveling the ground to provide level paths for the wheels, said implements con-V verging to the mouth of the bowl for directing earth scraped from .the ground into the bowl; and members secured to and extending rearwardly from the inner ends of said implements so as to be disposed generally longitudinally of the scraper and between said bowl and said implements for preventing earth scraped from the ground by the implements from passing between the latter and the sides of the bowl.

4. In a carrying scraper; a frame; a pair of wheels pivotally supporting the frame; a bowl pivoted on the frame; scraping implements carried by said frame and disposed in advance of said wheels for leveling the ground to provide level paths for the Wheels, said implements converging to the mouth of the bowl for directing earth scraped from the ground into the bowl; .and plates at the inner ends of said implements extending generally longitudinally of the bowl so as tospan the space between the inner ends of the implements and the sides of the bowl.

5. In a two lwheel scraper; a pair of wheels; a pair of-spaced side members securedone to the -other and pivoted at their lower rear portions to saidl wheels; a yoke pivoted to said members -in advance of said member pivots; a scrapingv bowl between said wheels and members and pivotally suspended from the upper portionofsaid members; means connected to said membersbatween the bowl pivots and the memberA pivotsfor movingsaid bowl to and from dumping position; and means connected to said yoke and said mem- .bers for elevating said bowl from loading position tojcarrying position. f

6. In a two wheelfscraper; a pair of ii/heels; a pair of spaced side members of triangular form secured one to the other' and pivoted at their4 lower rear corners to said wheels; a yoke having the arms Vthereof pivoted to said members in advance of said memberupivots and substantially at the same level thereof; a scraping bowl bevtween said wheels and pivotally suspended from -the upper corners of said members; hydraulic afleaw yrams pivotally connected to said members be tween the bowl pivots and the member pivots for moving said bowl to andv from dumping position; and hydraulic rams pivotally connected to said yoke and to said members at points substantially opposite the connections of lthe rst mentionedl rams to said membersVfor elevating said bowl. from loading position'to carrying position 1 '7. yIn a two whee1scraper;,-a'pair .of wheels; a pair of spaced side members of` triangular form secured .one to the other and pivoted at their lower rear corners to said wheels; a yoke having the arms thereof pivoted to said member in advance of said member pivots and substantially .at the'same level thereof; a scraping bowl between. said wheelsz and pivotally suspended from 'the' upper corners of said members;'f hydraulic forward cornersv thereof, for levellingthe earth nadvance of said wheels and directing the earth into said bowl.

. y HAROLD D. KADZ.4 

